Hello! Thank you so much for enjoying the demo (and for covering the game on your channel: I'll see to watching it properly sometime!)
As for the bug, was it a situation where the bird appears again after seeing them the first time? If it is, then I know exactly how to fix it! I've been trying to nab at them as I update this demo, but in the event that I've missed any others: waiting for an event to finish allows it not to repeat. I'll look again to see if I missed any others though, so thank you for the pointer!